JPH062819Y2 - Automotive engine room ventilation structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a ventilation structure for an engine room of a vehicle equipped with a front engine, and more particularly to an engine room ventilation structure suitable for use in a high-speed vehicle.

(Prior Art) Generally, in an automobile having an engine in the front of the vehicle body, air for cooling the engine, radiator, intercooler, condenser for car cooler, etc. is taken in from the front grill in the engine room. It is necessary to ventilate the heated air in the engine room.

Therefore, conventionally, the air in the engine room is discharged from the lower opening of the engine room to the lower side of the vehicle body or from the gap between the engine hood and the cowl top to the upper side of the vehicle body.

[Problems to be solved by the invention]

However, in a high-speed vehicle with a speed of 300 km / h or more, if the ventilation structure is such that the engine room in the front of the vehicle is exhausted to the lower side of the vehicle, there is a problem that the vehicle tends to float up at high speed Further, there is a problem that the exhaust air from the engine room to the upper side of the vehicle body is obstructed by the air flow along the upper surface of the hood.

The present invention is intended to solve these problems, and it is possible to guide the ventilation in the engine room in the front part of the vehicle body to the rear side without hindrance even when the vehicle is running at high speed.
An object is to provide an engine room ventilation structure for an automobile.

[Means for solving problems]

In order to achieve the above-mentioned object, an engine room ventilation structure for an automobile of the present invention is an engine room ventilation structure that is arranged from an engine room in the front part of the vehicle body to a rear part of the vehicle body above an under panel that covers the lower side of the vehicle body. In order to prevent the air exhausted from the air duct and passing through both sides of the gearbox of the rear axle drive differential gear from being caught in the rear surface of the gearbox,
It is characterized in that a rectifying body extending rearward from the rear side of the gear box is provided.

[Action]

In the above-described automobile engine room ventilation structure of the present invention,
The air exhausted from the engine room in the front of the vehicle is guided rearward through the air duct above the under panel that covers the underside of the vehicle, so that the vehicle is lifted by the air exhausted from the engine room even at high speeds. There is no.

Further, the air discharged rearward from the air duct and passing on both sides of the gearbox of the rear axle drive differential gear is rectified by a rectifying body extending rearward from the rear vicinity of the gearbox, and The inclusion of air on the rear surface is prevented.

〔Example〕

An automobile engine room ventilation structure as one embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a schematic structure thereof, and FIG. 2 is an explanatory view showing a main part of a structure at a rear portion of the vehicle body. FIG. 3 is a perspective view showing an automobile equipped with the above-mentioned engine room ventilation structure, looking up obliquely from below.

As shown in FIG. 1, an engine room 4 in which an engine 1, a radiator 2 and an intercooler 3 are arranged is formed in a front part of a vehicle body B, and a left-right pair is provided from the engine room 4 toward a rear part of the vehicle body. The engine room ventilation air duct 5 is disposed inside the vehicle body B.

A front end 5a of each air duct 5 is opened to a dash panel 7 that partitions the engine compartment 4 and the vehicle compartment 6, and a rear end 5b thereof is formed.
Is a gearbox 10 of a differential gear for driving a rear axle of a rear end of a drive shaft 9 which is rotationally driven by the engine 1.
It opens at the front. Incidentally, reference numeral 10 in FIG.
a indicates a rear axle.

The air duct 5 is provided by penetrating pillars, doors, quarter panels, etc. on both sides of the vehicle body B, and may be provided by utilizing a side seal having a closed cross section, an internal space such as a floor side member, or the like. Air duct 5 is third
It is provided above the under panel 11 that covers the lower side of the vehicle body B shown in the figure.

Then, the air in the engine room 4 guided rearward through the air duct 5 passes through both sides of the gear box 10,
The air is guided to a pair of left and right air discharge openings 12 at the rear end of the vehicle body.

A ventilation exhaust pipe (not shown) in the vehicle interior 6 is connected to the air duct 5, and as shown in FIG. 2, an air flow from the rear end opening of the air duct 5 toward the opening 12 at the rear end of the vehicle body B. Part of the rear axle wheel house 15
Is guided through the through hole 16 on the inner side wall thereof, and is further discharged downward from the notch 11a of the under panel 11.

Particularly, in this automobile engine room ventilation structure, the opening 12 at the rear end of the vehicle body is passed through both sides of the gear box 10.
The inner panel 1 is provided with a rectifying body 17 extending rearward from the rear side of the gear box 10 so that the air flow toward the rear side can be prevented from being caught in the rear surface of the gear box 10.
It is provided integrally with 1.

With the above configuration, the air exhausted from the engine room 4 in the front part of the vehicle body covers the underside of the vehicle body under panel 11
Since the air is guided rearward through the air duct 5 above, the vehicle body B is not lifted up by the exhaust air from the engine room 4 even when traveling at high speed.

Further, the air discharged rearward from the air duct 5 and passing on both sides of the gearbox 10 of the rear axle drive differential gear is rectified by the rectifying body 17 extending rearward from the rear side of the gearbox 10, It is possible to prevent air from being trapped in the rear surface of the gear box 10, which has an advantage that the air resistance of the vehicle body can be greatly reduced.

[Effect of device]

As described above in detail, according to the automobile engine room ventilation structure of the present invention, the following effects and advantages are obtained.

(1) The air exhausted from the engine room at the front of the vehicle is
Since it is guided rearward through the air duct above the under panel that covers the lower side of the vehicle body, the exhaust air from the engine room does not lift the vehicle body even at high speeds, thus preventing ventilation in the engine room. It will be done without.

(2) The air discharged rearward from the air duct and passing on both sides of the gearbox of the rear axle drive differential gear is rectified by a rectifier extending rearward from the vicinity of the rear side of the gearbox, and the gearbox Since the air is prevented from being caught in the rear surface of the box, the air resistance of the vehicle body is reduced.

[Brief description of drawings]

FIG. 1 shows an engine room ventilation structure for an automobile as one embodiment of the present invention. FIG. 1 is an explanatory view showing a schematic structure thereof, and FIG. 2 is an explanatory view showing a main part of a structure at a rear part of the vehicle body, FIG. 3 is a perspective view showing an automobile having the above-mentioned engine room ventilation structure as viewed from diagonally below. 1 ... Engine, 2 ... Radiator, 3 ... Intercooler, 4 ... Engine room, 5 ... Air duct, 5a
...... Front end of air duct, 5b …… Rear end of air duct, 6
...... Car interior, 7 ...... Dash panel, 9 ...... Drive shaft, 10
...... Gearbox for differential gears, 10a ……
Rear axle, 11 ... under panel, 12 ... air exhaust opening, 13 ... front wheel, 14 ... rear wheel, 15 ... wheel house, 16 ... through hole, 17 ... rectifier, B ... Car body.

Claims (1)

[Scope of utility model registration request] 1. An engine room ventilation air duct provided from an engine room in the front part of the vehicle body to a rear part of the vehicle body above an under panel that covers the lower side of the vehicle body, and is discharged from the air duct for driving the rear axle. In order to prevent air passing through both sides of the gear box of the differential gear from being caught in the rear surface of the gear box, a rectifying body extending rearward from near the rear side of the gear box is provided. The engine room ventilation structure for automobiles.